Yaesu FT-450 Operation Manual

Also see for FT-450: Brochure & specs Reference Manual User manual Technical supplement

Page 54 FT-450 OPERATION MANUALTONE S QUELCH O PERATIONYou may also use “Tone Squelch” whereby your receiver will be kept silent until an incoming signal bearing amatching CTCSS tone is received. Your receiver’s squelch will then open in response to the reception of therequired tone.1. Press and hold the [F] button for one second toenter the Menu mode. The “ ” icon will ap-pear on the display.2. Rotate the [DSP/SEL] knob to select the menuitem “EXT MNU”.3. Press the [DSP/SEL] knob to enable adjustment ofthis menu item. The “ ” icon will be blinking.4. Rotate the [DSP/SEL] knob to select “ON” to ex-pand the menu items.5. Press the [DSP/SEL] knob. The “ ” icon re-turns to appear continuously.6. Rotate the [DSP/SEL] knob to select menu item“SQL TYP”.7. Press the [DSP/SEL] knob to enable adjustment ofthis menu item. The “ ” icon will be blinking.8. Rotate the [DSP/SEL] knob to select the “ENCDEC”.9. Press the [DSP/SEL] knob. The “ ” icon re-turns to appear continuously.10. Rotate the [DSP/SEL] knob to select menu item“TONE F”, then press the [DSP/SEL] knob to en-able adjustment of this menu item.11. Rotate the [DSP/SEL] knob to select the desiredCTCSS tone to be used. A total of 50 standardCTCSS tones are provided.12. Press the [DSP/SEL] knob. The “ ” icon re-turns to appear continuously.13. Press and hold the [F] button for one second to savethe new setting and return to normal operation.When Tone Squelch is activated, the “ ” iconappears in the display.FM M ODE O PERATION[F] button[DSP/SEL] knobCTCSS TONE FREQUENCY (Hz)67.0 69.3 71.9 74.4 77.0 79.7 82.5 85.488.5 91.5 94.8 97.4 100.0 103.5 107.2 110.9114.8 118.8 123.0 127.3 131.8 136.5 141.3 146.2151.4 156.7 159.8 162.2 165.5 167.9 171.3 173.8177.3 179.9 183.5 186.2 189.9 192.8 196.6 199.5203.5 206.5 210.7 218.1 225.7 229.1 233.6 241.8250.3 251.4